中央研究院  |  資訊科學研究所  |  多媒體網路與系統實驗室
Effect of Network Quality on Player Departure Behavior in Online Games
(NOTE: Sheng-Wei Chen is also known as Kuan-Ta Chen.)

Abstract
Understanding the impact of network conditions on player satisfaction, which is one of the major concerns of network game designers, is a popular research topic. Of the various ways to gauge user satisfaction, in this paper, we focus on how network quality affects a player's decision to leave a game prematurely. To answer this question, we analyze a 1,356-million-packet trace from a large commercial MMORPG called ShenZhou Online.<p> <b>We show that both network delay and network loss significantly affect a player's decision to leave a game prematurely. It is feasible to predict whether players will quit prematurely based on the network conditions they experience.</b> The proposed model can determine the relative impact of different types of network impairment. For our traces, the degrees of player intolerance of network delay, delay jitter, client packet loss, and server packet loss are in the proportion of 1:2:4:3 approximately. The model can also be used to make system design decisions. Through simulations, we show that by prioritizing server processing according to the goodness of network conditions, employing de-jitter buffers, or replacing TCP with a more lightweight transport protocol, the probability of premature departure can be significantly reduced. In this way, we demonstrate how our model of players' network experience provides feedback for the design of online games.<p> <font color="red"><i>Related paper:</i></font><br> - <a href="http://mmnet.iis.sinica.edu.tw/publication_detail.html?key=chen06_traffic">Game Traffic Analysis: An MMORPG Perspective</a><br> - <a href="http://mmnet.iis.sinica.edu.tw/publication_detail.html?key=chen06_gamer_qos">How Sensitive are Online Gamers to Network Quality?</a>

Materials
Citation
Kuan-Ta Chen, Polly Huang and Chin-Laung Lei, "Effect of Network Quality on Player Departure Behavior in Online Games," IEEE Transactions on Parallel and Distributed Systems, Vol. 20, No. 5, May, 2009.

BibTex
@ARTICLE{chen09:qoe,
  AUTHOR     = {Kuan-Ta Chen and Polly Huang and Chin-Laung Lei},
  TITLE      = {Effect of Network Quality on Player Departure Behavior in Online Games},
  JOURNAL    = {IEEE Transactions on Parallel and Distributed Systems},
  YEAR       = {2009},
  MONTH      = {May},
  VOLUME     = {20},
  NUMBER     = {5},
  PAGES      = {593--606},
  PUBLISHER  = {IEEE Computer Society}
}