Loading...

Improving QoS for Multimedia Applications in Wireless Networks Using Linear Codes

Esmailkashi, Majid | 2008

381 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 39294 (52)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Rabiee, Hamid Reza
  7. Abstract:
  8. Delivering multimedia over wireless Networks is a very challenging task. Multimedia delivery inherently has strict quality-of-service (QoS) requirement on bandwidth, delay, and delay jitter.. The advent of wireless networks further exacerbates the variance of network conditions and brings greater challenges for multimedia delivery. Network coding is realized to have great potential for improving throughput limitation of current multi-hop wireless networks. The most significant characteristic of network coding is to send more information in each transmission by combining information from different sources leading to increased bandwidth and network throughput, decreased energy consumption and data transmission delay. Existing network coding schemes find coding opportunities and use them in forwarding multiple packets, which are coded together, in a single transmission, and consequently, they achieve several fold increase in the bandwidth and throughput of wireless networks. In this thesis, we propose, a new protocol for multi-hop wireless networks, which does attaching packets in addition to coding them. This new protocol has an attaching module which attaches non-encoded packets together opportunistically. We show that, this new protocol can convey more packets in a single transmission using this module. In addition, our protocol, decodes the received coded packets, respective or not, to increase the decoding probability leading to reduction in the number of retransmissions. In addition, opportunistic routing has been considered as another effective strategy for improving the quality of service of wireless networks. To achieve improved network quality of service, in this thesis, we propose a coding-aware opportunistic routing protocol. Our results show an increase bandwidth and decreased delay in the wireless networks
  9. Keywords:
  10. Service Quality ; Wireless Networks ; Bandwidth ; Network Coding ; Multimedia Applications

 Digital Object List

 Bookmark

No TOC