1,075 research outputs found
Performance Study of Mobile TV over Mobile WiMAX Considering Different Modulation and Coding Techniques
With the advent of the wide-spread use of smart phones, video streaming over
mobile wireless networks has suddenly taken a huge surge in recent years.
Considering its enormous potential, mobile WiMAX is emerging as a viable
technology for mobile TV which is expected to become of key importance in the
future of mobile indus- try. In this paper, a simulation performance study of
Mobile TV over mobile WiMAX is conducted with different types of adaptive
modulation and coding taking into account key system and environment parameters
which include the variation in the speed of the mobile, path-loss, scheduling
service classes with the fixed type of mod- ulations. Our simulation has been
conducted using OPNET simulation. Simulation results show that dynamic
adaptation of modulation and coding schemes based onchannel conditions can
offer considerably more en- hanced QoS and at the same time reduce the overall
bandwidthof the system.Comment: 12 pages, 9 figures. arXiv admin note: substantial text overlap with
arXiv:1312.7442; and text overlap with arXiv:1005.0976 by other author
Media fusion and future TV: Examining multi-screen TV convergence in Singapore
This study examines Singapore's national media blueprint and industry stakeholders' coping strategies in response to multi-screen TV development. The findings show Singapore muti-screen TV development is still at a nascent stage after launching Media Fushion and FutureTV plans in mid 2009. The policymakers play a key role to follow national media blueprint to unify the inter-industry and cross-country collaboration. TV operators and telcos are found to remediate themselves by harnessing the power of internet and mobile technologies for content innovation and distribution. To tackle the complicated convergent issues in multi-screen TV industry, this study proposes to separately regulate the technology-neutral platforms and diverse audiovisual content. It also recommends a pro-innovative policy with the light-touch licensing scheme and loose content regulation to facilitate the development of the next TV. --three-screen TV,multi-screen TV,convergence,media fusion,IPTV,mobile TV,cross-platform,TV technologies,TV market,TV policy
Smart PIN: performance and cost-oriented context-aware personal information network
The next generation of networks will involve interconnection of heterogeneous individual
networks such as WPAN, WLAN, WMAN and Cellular network, adopting the IP as common infrastructural protocol and providing virtually always-connected network. Furthermore,
there are many devices which enable easy acquisition and storage of information as pictures, movies, emails, etc. Therefore, the information overload and divergent content’s
characteristics make it difficult for users to handle their data in manual way. Consequently, there is a need for personalised automatic services which would enable data exchange across heterogeneous network and devices. To support these personalised services, user centric approaches
for data delivery across the heterogeneous network are also required.
In this context, this thesis proposes Smart PIN - a novel performance and cost-oriented context-aware Personal Information Network. Smart PIN's architecture is detailed including its network, service and management components. Within the service component, two novel schemes for efficient delivery of context and content data are proposed:
Multimedia Data Replication Scheme (MDRS) and Quality-oriented Algorithm for Multiple-source Multimedia Delivery (QAMMD).
MDRS supports efficient data accessibility among distributed devices using data replication which is based on a utility function and a minimum data set. QAMMD employs a buffer underflow avoidance scheme for streaming, which achieves high multimedia quality without content adaptation to network conditions. Simulation models for MDRS and
QAMMD were built which are based on various heterogeneous network scenarios. Additionally a multiple-source streaming based on QAMMS was implemented as a prototype and tested in an emulated network environment. Comparative tests show that MDRS and QAMMD perform significantly better than other approaches
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