Type
Text
Type
Thesis
Date
2009-05-01
Keywords
VoIP | voice over IP | EVDO Radio Access Network | RAN
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/70841
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
Voice over IP (VoIP) has been deployed over the wireline networks for the last decade. It achieved remarkable success of the adaptation as the replacement of circuit switched legacy voice service. It also enabled the service providers to converge data and voice services over a single broadband network. This evolutionary activity has been also initiated in the wireless network as the emergence of broadband wireless network. VoIP has been initially applied to the Wireless Local Area Network (WLAN) over 802.11a/b/g interface. It also has been applied to the Wireless Wide Area Network (WWAN) since 3G networks were deployed. In addition, convergence of wireline and wireless network would accelerate the adoption of VoIP application over the wireless network. iii Within several key technical challenges such as transport efficiency and QoS, we selected Voice quality assurance as the dissertation topic since it becomes more critical issue on the mobility network, especially over the handoff period where the additional packet transmission delay, jitter and loss occurs. We presents the enhanced packet based VoIP quality monitoring and measurement method as well as a validation method on a cross-check with the speech quality measurement. We also presents an enhanced method for the VoIP quality measurement from the existing E-model, and applied the method to the EVDO Radio Access Network (RAN) as an experiment. The EVDO RAN has been deployed as 3G network in US while it typically supports up to approx. 2Mpbs forward link and up to 153 kbps over reverse link to offer data service an the evolution of CDMA2000. However, EVDO also offers the technical challenge to overcome the performance fluctuation upon the mobility. We address the technical issues on the existing E-model when it is applied to the EVDO, and propose an enhanced method expanding the existing E-model well suited to the VoIP over the EVDO. We also use the Anique+ for the reference to verify that the proposed solution produces the superior accuracy to the existing E-model based measurement. Once we analyzed the correlations between E-model and Anique+ as a reference, we applied to the mobility impact on EVDO network by measuring the packet loss, jitter and data throughput impact by the EVDO forward link handoff. We also investigate the unvoiced frame effect on the packet loss by detecting the VoIP packet type. Unvoiced frame type is useful to compromise VoIP quality impact by the burst packet loss during the handoff since it takes more than 50% of the VoIP frames. iv We investigated the mobility impact on the VoIP service caused by the handoff, and define a validation model with leverage of both E-Model and Anique+. Our experimental analysis over the EVDO network proved the mobility impact on the VoIP quality due to handoff. We achived the optimal size of receiver buffer and data throughput that are recommended for VoIP application configuration to minimize the mobility impact.
Recommended Citation
Park, Seyong, "Mobility Impact on VoIP Quality over Radio Access Network" (2009). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 55.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/55