Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Link-layer-assisted seamless MPEG-4 streaming over mobile IP-enabled wireless LAN

[+] Author Affiliations
Chul-Ho Lee, Dongwook Lee, JongWon Kim

Gwangju Institute of Science and Technology (South Korea)

Proc. SPIE 5600, Multimedia Systems and Applications VII, 111 (October 25, 2004); doi:10.1117/12.571414
Text Size: A A A
From Conference Volume 5600

  • Multimedia Systems and Applications VII
  • Chang Wen Chen; C.-C. Jay Kuo; Anthony Vetro
  • Philadelphia, PA | October 25, 2004

abstract

In the mobile IP-enabled wireless LAN (WLAN), packet flows are corrupted due to the handoff of a mobile node at the link and network layers, which results in burst packet losses. This transient behavior hurts time-critical streaming media applications so much. Many solutions have been suggested to address this handoff-related problem. However, even with recent low-latency and smooth handoff options, seamless streaming (i.e., without any playback disruption due to the handoff) is not easy to achieve in the practical situation. Since no packet will be delivered to the mobile node during the handoff process, this can cause temporary packet underflows at the streaming client. Thus, to avoid packet underflows, one has to pre-buffer the streaming client sufficiently before the handoff. Note that the required level of pre-buffering depends on the efficiency of adopted link-/IP-layer handoff options. In this paper, we are targeting seamless MPEG-4 streaming over the mobile IP-enabled WLAN. For this, we are introducing a seamless media streaming framework by estimating the accurate pre-buffering level to compensate the handoff latency and proposing a combination of schemes as a preliminary version of the proposed framework. We utilize a Layer 2 (L2) trigger (event) about a change of an associated access point (AP) with a wireless network interface to reduce the agent discovery time in total handoff latency. A packet forwarding with buffering mechanism is also realized at the foreign agent (FA). With these two options, we can nearly eliminate packet losses during the handoff period. Then, we perform pre-buffering adjustment based on handoff latency experimentally measured and analytically obtained by the handoff transient time analysis. The experimental results show that the proposed approach can eliminate packet losses during the handoff period and provide the feasibility of seamless MPEG-4 video streaming over the mobile IP-enabled WLAN.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Chul-Ho Lee ; Dongwook Lee and JongWon Kim
"Link-layer-assisted seamless MPEG-4 streaming over mobile IP-enabled wireless LAN", Proc. SPIE 5600, Multimedia Systems and Applications VII, 111 (October 25, 2004); doi:10.1117/12.571414; http://dx.doi.org/10.1117/12.571414


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.