A measurement study regarding quality of service and its impact on multiplayer online games

Bredel,; Fidler,

doi:10.1109/netgames.2010.5679537

Cited by 16 publications

(13 citation statements)

References 18 publications

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“…Pavlovych and Gutwin's study [2012] examined the effect of latency and jitter in a mouse-based accuracy task and observed that user accuracy was greatly affected by a 60ms jitter with 170ms of average latency. Another study investigating delay, jitter, and packet loss found that jitter only had a minor influence on the win probability as well as the score rates of two AI bots [Bredel and Fidler 2010]. They took into account jitter up to 50ms with a delay of 100ms.…”

Section: Related Workmentioning

confidence: 99%

Player perception of delays and jitter in character responsiveness

Normoyle

Guerrero

Jörg

2014

Proceedings of the ACM Symposium on Applied Perception

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Response lag in digital games is known to negatively affect a player's game experience. Particularly with networked multiplayer games, where lag is typically unavoidable, the impact of delays needs to be well understood so that its effects can be mitigated. In this paper, we investigate two aspects of lag independently: latency (constant delay) and jitter (varying delay). We evaluate how latency and jitter each affect a player's enjoyment, frustration, performance, and experience as well as the extent to which players can adjust to such delays after a few minutes of gameplay. We focus on a platform game where the player controls a virtual character through a world. We find that delays up to 300ms do not impact the players' experience as long as they are constant. When jitter was added to a delay of 200ms, however, the lag was noticed by participants more often, hindered players' ability to improve with practice, increased how often they failed to reach the goal of the game, and reduced the perceived motion quality of the character.

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Section: Related Workmentioning

confidence: 99%

Player perception of delays and jitter in character responsiveness

Normoyle

Guerrero

Jörg

2014

Proceedings of the ACM Symposium on Applied Perception

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“…There are several projects which have studied the effect of latency when remote users interact, including [24], [25], [2], [26], [4], [3], and [27]. When the latency from a user does an action until it is reflected in, say, a game, is more than 200ms, the user will notice the delay and his actions and scores are impacted by it.…”

Section: Related Literaturementioning

confidence: 99%

“…Variations in packet size, buffer delay, and routing create packet jitter. The influence of the jitter in games is measured in [26], [31], [32], and [33]. They conclude that jitter had only a minor impact on the win probability, the scores and the user experience.…”

Section: Related Literaturementioning

confidence: 99%

Masking the Effects of Delays in Human-to-Human Remote Interaction

Su¹,

Bjørndalen²,

Ha³

et al. 2014

Annals of Computer Science and Information Systems

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Abstract-Humans can interact remotely with each other through computers. Systems supporting this include teleconferencing, games and virtual environments. There are delays from when a human does an action until it is reflected remotely. When delays are too large, they will result in inconsistencies in what the state of the interaction is as seen by each participant. The delays can be reduced, but they cannot be removed. When delays become too large the effects they create on the humanto-human remote interaction can be partially masked to achieve an illusion of insignificant delays. The MultiStage system is a human-to-human interaction system meant to be used by actors at remote stages creating a common virtual stage. Each actor is remotely represented by a remote presence created based on a stream of data continuously recorded about the actor and being sent to all stages. We in particular report on the subsystem of MultiStage masking the effects of delays. The most advanced masking approach is done by having each stage continuously look for late data, and when masking is determined to be needed, the system switches from using a live stream to a pre-recorded video of an actor. The system can also use a computable model of an actor creating a remote presence substituting for the live stream. The present prototype uses a simple human skeleton model.

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“…Academic research has formalized the impact of lag on players experiences in games [1], [2], [6], [19]- [21]. In response, a number of solutions have been proposed to mitigate lag's impact, through latency masking techniques, widely distributed game infrastructure, and improved game hardware [9]- [13], [22], [23].…”

Section: Introductionmentioning

confidence: 99%

Cascading impact of lag on Quality of Experience in cooperative multiplayer games

Howard¹,

Cooper²,

Wittie³

et al. 2014

2014 13th Annual Workshop on Network and Systems Support for Games

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Playing online games should be fun. One of the primary causes of player frustration in online games is lag, or delay in exchange of game state data [1]- [8]. Current lag mitigation strategies are based on the assumption that a player's Quality of Experience (QoE) is influenced only by her own lag [9]- [12]. We systematically show that this assumption is incorrect, because in an online cooperative game the change in QoE of one player due to their lag can have a cascading effect on the QoE of the other players. Our results are obtained through a novel experimental framework based on previous QoE and online game research.Understanding a player's QoE as a cascade function that includes other players' network conditions provides valuable information for designing cooperative online games. Based on our observations, we recommend changes to the current approach to lag mitigation in cooperative games. We argue that the primary objective of lag mitigation should not be to reduce the lag of all players. Instead the primary objective should be to reduce the lag of the most lagged player within each cooperative group.

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A measurement study regarding quality of service and its impact on multiplayer online games

Cited by 16 publications

References 18 publications

Player perception of delays and jitter in character responsiveness

Player perception of delays and jitter in character responsiveness

Masking the Effects of Delays in Human-to-Human Remote Interaction

Cascading impact of lag on Quality of Experience in cooperative multiplayer games

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