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In the video on demand system, user waiting time and bandwidth allocation are major challenges for the video broadcasting in mobile ad hoc environment. There are many broadcasting schemes which provide efficient bandwidth allocation and optimal user waiting time. In our work we divide channel into two groups (Regular Channel and Sub Channel) and video data into segments and sub-segments. Broadcasting...
Video-on-demand service in wireless networks is one important step to achieving the goal of providing video services anywhere anytime. Typically, carrier mobile networks are used to deliver videos wirelessly. Since every video stream comes from the base station, regardless of what bandwidth sharing techniques are being utilized, the media stream system is still limited by the network capacity of the...
Data broadcast is an advanced technique to realize large scalability and bandwidth utilization in a mobile computing environment. In the heterogeneous data broadcast, the data size is variant with time in multiple broadcast channels. However, traditional indexing schemes do not consider variant data size to design indexing techniques in the multiple channels. Therefore, the above drawback leads to...
On-demand broadcast is an efficient wireless data dissemination method for mobile services.As the rapid growth of the mobile application,there is an increasing need for system to support large data dissemination.This paper investigates wireless on-demand broadcast algorithms.We propose a new scheduling algorithm called FMT(Fluent Media Transfer) which takes the flux of program,the program size,request...
We present Pegasus, a system providing wireless connection roaming at high velocities over multiple interfaces. Our system operates over WiMax, as well as over ldquoin siturdquo WiFi networks, while at the same time offering transparency to user level applications by allowing a single IP address per user, operating in a decentralized mode. One of our most important findings is that in a system where...
Caching in mobile environment is complicated by the fact that the caches need to be kept consistent. Consistency in cache can be achieved by the Cache Invalidation Strategies. In this paper we assume synchronous stateful algorithm with the objective to maximize bandwidth utilization. Invalidation Reports (IRs) are periodically broadcasted and Updated Invalidation Reports (UIRs) are broadcasted as...
More and more, multimedia services are being accessed via fixed and mobile networks. These services are typically much more sensitive to packet loss, delay and/or congestion than traditional services. In particular, multimedia data is often time critical and, as a result, network issues are not well tolerated and significantly deteriorate the userpsilas quality of experience (QoE). We therefore propose...
In a large-scale mobile gaming environment with limited wireless network bandwidth, efficient mechanisms for state update are crucial to allow graceful real-time interaction for a large number of players. By using the state updating threshold as a key parameter that bridges the resulting state distortion and the network traffic, we are able to study the fundamental traffic-distortion tradeoffs via...
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