Measurement and Analysis of One-Way Delays over IEEE 802.16e/WiBro Network

Kim, Dongmyoung; Cai, Hubo; Choi, Sunghyun

doi:10.1109/vetecf.2009.5378848

Cited by 1 publication

(4 citation statements)

References 6 publications

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“…The scatter plot is shown in Figure . Obviously, there is an increasing linear relation between RTTs and inter‐arrival times of uplink packets, which is in line with . However, the improvement is not very significant because of the delayed ACK mechanism and TCP congestion control.…”

Section: Low‐layer Analysissupporting

confidence: 58%

“…The measurement work in focuses on low‐layer details, in particular the evaluation of HO characteristics. Some papers specifically focus on delay and the bandwidth request mechanism with piggyback in WiMAX. The performance of applications via WiMAX has been also evaluated, such as measurement of TCP/UDP transmission in , BitTorrent and VoIP measurement in and , respectively.…”

Section: Related Work and Motivationmentioning

confidence: 99%

“…According to the previous report on one‐way delay measurement in the same WiMAX network in Seoul , on average, T UL is 80.1ms, and T DL is 25.5ms, because of the asymmetric design of uplink and downlink access capacity and bandwidth allocation mechanism in WiMAX. When we trace the path of the packets by tracert command, T sys 1 + T sys 2 is normally around 20ms; thus, RTT est = 125.6ms.…”

Section: Higher‐layer Analysismentioning

confidence: 99%

“…When the avatar takes actions continuously and, thus, uplink packets are generated more frequently, the average RTT drops to around 132ms. This phenomenon that higher rate of uplink traffic shortens RTT values is mainly due to the piggyback‐based bandwidth request for WiMAX uplink transmissions . Normally, every uplink transmission in the BE service should be requested to a BS, and then, the BS allocates slots in uplink bandwidth capacity, which may take considerable time before actual transmission.…”

Section: Low‐layer Analysismentioning

confidence: 99%

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Measurement and analysis of online gaming services on mobile WiMAX networks

Wang

Chen

Kim

et al. 2013

Wirel. Commun. Mob. Comput.

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Online games have been played mainly in desktop computers over wired networks because of high speed and intensive computation requirements. The advances in mobile devices and ever increasing wireless link bandwidth motivate us to study whether players can enjoy online gaming over broadband wireless networks such as mobile Worldwide Interoperability for Microwave Access (WiMAX). In this paper, we carry out comprehensive measurements of the World of Warcraft (WoW) over the mobile WiMAX in Seoul, Korea, and analyze the network performance focusing on two aspects: (1) network layer dynamics such as round trip time, jitter, and packet loss and (2) WiMAX link layer statistics such as the radio signal strength, handovers, and piggyback mechanism. From the empirical data, we set up performance models and evaluate the performance of WoW over WiMAX. We also discuss how to improve the service quality of online gaming over WiMAX. Copyright © 2013 John Wiley & Sons, Ltd. KEYWORDSonline gaming service; mobile WiMAX; measurement *CorrespondenceHyun-chul Kim, Department of Computer Software Engineering, Sangmyung University, Cheonan, Korea. E-mail: hyunchulk@gmail.com Ted "Taekyoung" Kwon, Department of Computer Science and Engineering, Seoul National University, Seoul, Korea. E-mail: tkkwon@snu.ac.krOver the last decade, the online games have become one of the most popular and profitable applications on the Internet. So far, people have enjoyed various gaming experiences in virtual worlds mostly over the wired Internet, which offers stable connection with short delays and small jitter. Recently, more and more people choose to play games via wireless and mobile networks [1,2], which has opened the new era of online entertainment services of the Internet. Over the recent few years, Worldwide Inter-operability for Microwave Access (WiMAX) network based on the IEEE 802.16(e) standard [3] has gained substantial attention as an IP-based wireless access technology for mobile users. As mobile WiMAX supports handovers (HOs) and mobility management, which potentially provides continuous IP-compatible Internet services, more and more mobile users are likely to use it to play online games, particularly in a bus or metro [4].The world's first successful WiMAX network was deployed and commercialized in Seoul, Korea, by Korea Telecom (KT) in 2006, being referred to as Wireless Broadband (WiBro) [5]. WiBro, the Korean version of WiMAX † , operates at 2.3 GHz bands with a 10 MHz channel bandwidth, adopting time division duplex between downlink and uplink [5]. For flexible bandwidth allocation among users, the orthogonal frequency division multiple access is employed for multiple access. A base station (BS) offers an aggregate throughput of 30 to 50 Mbps theoretically and covers a radius of 1 to 5 km, supporting mobility up to 120 km/h [6]. To keep the continuous Internet connectivity, when a subscriber station (SS) moves across the boundaries between cells, the SS performs an HO that incurs processing delay, which potentially impairs th...

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Section: Low‐layer Analysissupporting

confidence: 58%