A Cross-Layer Model for Video Multicast Based TCP-Adaptive FEC over Heterogeneous Networks

2010 ◽  
pp. 1879-1895
Author(s):  
Ghaida A. AL-Suhail ◽  
Liansheng Tan ◽  
Rodney A. Kennedy
Keyword(s):  
Forward Error Correction ◽  
Video Quality ◽  
Wireless Channel ◽  
Cross Layer ◽  
Radio Link ◽  
Layer Model ◽  
Data Link ◽  
Link Layer ◽  
Adaptive Fec ◽  
Forward Error

In this article, we present a simple cross-layer model that leads to the optimal throughput of multiple users for multicasting MPEG-4 video over a heterogeneous network. For heterogeneous wired-to-wireless network, at the last wireless hop there are bit errors associated with the link-layer packets that are arising in the wireless channel, in addition of overflow packet dropping over wired links. We employ a heuristic TCP function to optimize the cross-layer model of data link and physical (radio-link) layer. An adaptive Forward-Error-Correction (FEC) scheme is applied at the byte-level as well as at the packet-level. The corresponding optimal video quality can be evaluated at each client end. The results show that a server can significantly adapt to the bandwidth and FEC codes to maximize the video quality of service (QoS) in terms of temporal scaling when a maximum network throughput for each client is reached.

scholarly journals Identifying Opportunities for Exploiting Cross-Layer Interactions in Adaptive Wireless Systems

2007 ◽  
Vol 2007 ◽  
pp. 1-11 ◽  
Author(s):  
Troy Weingart ◽  
Douglas C. Sicker ◽  
Dirk Grunwald
Keyword(s):  
Error Detection ◽  
Software Defined Radio ◽  
Forward Error Correction ◽  
Instant Messaging ◽  
Transport Layer ◽  
Cross Layer ◽  
File Transfer ◽  
Data Link ◽  
Frame Size ◽  
Forward Error

The flexibility of cognitive and software-defined radio heralds an opportunity for researchers to reexamine how network protocol layers operate with respect to providing quality of service aware transmission among wireless nodes. This opportunity is enhanced by the continued development of spectrally responsive devices—ones that can detect and respond to changes in the radio frequency environment. Present wireless network protocols define reliability and other performance-related tasks narrowly within layers. For example, the frame size employed on 802.11 can substantially influence the throughput, delay, and jitter experienced by an application, but there is no simple way to adapt this parameter. Furthermore, while the data link layer of 802.11 provides error detection capabilities across a link, it does not specify additional features, such as forward error correction schemes, nor does it provide a means for throttling retransmissions at the transport layer (currently, the data link and transport layer can function counterproductively with respect to reliability). This paper presents an analysis of the interaction of physical, data link, and network layer parameters with respect to throughput, bit error rate, delay, and jitter. The goal of this analysis is to identify opportunities where system designers might exploit cross-layer interactions to improve the performance of Voice over IP (VoIP), instant messaging (IM), and file transfer applications.

Impact of Cross-Layer Adaptations of Mobile IP on IEEE 802.11 Networks on Video Streaming

2010 ◽  
Vol 1 (3) ◽  
pp. 59-80
Author(s):  
P. De Cleyn ◽  
C. Blondia
Keyword(s):  
Video Streaming ◽  
Mobile Ip ◽  
Video Quality ◽  
Real Life ◽  
Cross Layer ◽  
Performance Gain ◽  
Layer Model ◽  
802.11 Networks ◽  
Simulation Scenario ◽  
Cross Layering

The OSI network layer model provides a strictly separated stacked architecture to abstract the behavior of one layer from the other. Although this model has a lot of advantages, it also makes it easy to lose the bigger picture. In this paper, the authors describe the advantages that can be made by cross-layering the link layer and networking layer to optimize handovers. The performance gain of these cross-layer adaptations will be analyzed using a simulation scenario and compared to the results from a real-life video streaming test. The authors will show that the performance gain in network parameters cannot be directly mapped on the gain of the video quality.

scholarly journals Performance Analysis Of A Cellular System Using C-Ofdm Techniques

2013 ◽  
pp. 48-57
Author(s):  
Lopamudra Swain
Keyword(s):  
Forward Error Correction ◽  
Convolutional Code ◽  
Wireless Channel ◽  
Background Information ◽  
Modulation Scheme ◽  
Carrier System ◽  
Single Carrier ◽  
Rate Transmission ◽  
Trellis Code ◽  
Forward Error

The basic idea of COFDM is to split the modulation samples of incoming data stream onto a large number of carriers instead of modulating a unique carrier. Therefore, COFDM is an effective technique for combating multi-path fading and for highbit- rate transmission over wireless channel. In a single carrier system a frequency Selective fading can cause the entire transmission link to fail, but in an COFDM multi carrier system, only a small percentage of the sub-carriers will be corrupted. Frequency and time interleaving in conjunction with forward error correction coding can then be used to correct for erroneous subcarriers. The background information with the aim to provide an intuitive explanation of our research motivation. C-OFDM is the modulation scheme of choice , as enshrined in International standard for all forms of digital broadcasting both audio and video and including satellite, terrestrial, and cable. In the existing standard the “coding” referred to consists of an inner convolutional code concatenated with an outer R-S code; here in this thesis, we replace the inner code with the coding like space time trellis code for analysis.

Performance Enhancement of Fiber Optic and Optical Wireless Communication Channels by Using Forward Error Correction Codes

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
I. S. Amiri ◽  
Ahmed Nabih Zaki Rashed ◽  
A.H.M Shahariar Parvez ◽  
Bikash Kumar Paul ◽  
Kawsar Ahmed
Keyword(s):  
Wireless Communication ◽  
Error Correction ◽  
Communication Systems ◽  
Forward Error Correction ◽  
Wireless Channel ◽  
Error Rates ◽  
Operating Conditions ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Forward Error

AbstractThe study has outlined the different correction codes based optical wireless communication channel and security management in free space optics communication systems. The used codes that are namely forward error correction (FEC) code, Reed Solomon (RS) code, and Redundancy check (RC) code. The output power, maximum Q-parameter coefficient and minimum data error rates are estimated with these codes with variations of input signal power and propagation distances. The performance of optical wireless channel is enhanced with FEC code in compared to other proposed codes under the same operating conditions.

Mobile Video Streaming Over Heterogeneous Networks

2012 ◽  
pp. 737-763
Author(s):  
Ghaida A. Al-Suhail ◽  
Martin Fleury ◽  
Salah M. Saleh Al-Majeed
Keyword(s):  
Video Streaming ◽  
Heterogeneous Network ◽  
Forward Error Correction ◽  
Video Quality ◽  
Mobile Terminal ◽  
Video Stream ◽  
Streaming Server ◽  
Wireless Ip ◽  
Channel Errors ◽  
Forward Error

All-IP networks are under development with multimedia services in mind. Video multicast is an efficient way to deliver one video simultaneously to many users over such heterogeneous wired-to-wireless networks, such as in wireless IP applications where a mobile terminal communicates with an IP server through a wired IP network in tandem with a wireless network. Unicast video streaming is also an attractive way to deliver time-shifted TV to mobile devices. This Chapter presents a simple cross-layer model that leads to the optimal throughput to multiple users for multicasting video over a heterogeneous network. An adaptive forward-error-correction scheme is applied at the byte-level as well as at the packet-level to reduce channel errors. The results show that a server can significantly adapt to the bandwidth and FEC codes to maximize the video quality of service. For unicast streaming, the Chapter presents a single negative acknowledgment scheme in which a video stream is transmitted over a heterogeneous network from a streaming server to a mobile device in a WiMAX network. The broadband streaming system is compared to several candidate solutions based on originally wired network congestion controllers. Multi-connection streaming is also investigated.

An Improved Cross-Layer Architecture for H.264/SVC Transmission over IEEE 802.11e Networks

2013 ◽  
Vol 303-306 ◽  
pp. 1933-1938
Author(s):  
Yun Feng Wang ◽  
Hong Bing Ma
Keyword(s):  
Video Transmission ◽  
Scalable Video Coding ◽  
Video Quality ◽  
Wireless Channel ◽  
Ieee 802.11E ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Application Layer ◽  
Mapping Mechanism

As an extension to H.264, Scalable Video Coding (SVC) provides three types of scalability, which makes it more suitable for the video transmission over wireless networks. IEEE 802.11e introduces EDCA mechanism to support Quality of Service (QoS). In this paper, a scheme, based on cross-layer design between application layer and MAC layer, is proposed to improve SVC transmission over 802.11e networks. With optimized mapping mechanism and queue management, the approach has taken the SVC video priority and network congestion status into consideration. Simulation demonstrates the effectiveness of the algorithm. The experimental results show that our approach can get full use of the limited wireless channel resources, by which SVC packets with high priority can obtain better protection, thus the decoding video quality can be significantly improved.

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