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Spectral Efficiency Performance of MBSFN-enabled LTE Networks

Spectral Efficiency Performance of MBSFN-enabled LTE Network...

6th Annual IEEE International conference on Wireless and Mobile computing, networking and Communications (WiMob)/STMWC/NASSUE/CMPA/VECON/AWSAN/AWSAN

作者： Alexiou, Antonios Bouras, Christos Kokkinos, Vasileios Papazois, Andreas Tsichritzis, George Univ Patras Comp Engn & Informat Dept Patras Greece Univ Patras Res Acad Comp Technol Inst Patras Greece

ISBN: (纸本)9781424477425

Long Term Evolution (LTE) constitutes the latest step before the 4th generation (4G) of radio technologies designed to increase the capacity and speed of mobile communications. To support multimedia Broadcast/Multicast Services (MBMS), LTE offers the possibility to transmit multimedia Broadcast multicast service over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. This enables over-the-air combining, thus improving the Signal to Interference plus Noise Ratio (SINR) and spectral efficiency (SE) significantly compared to conventional MBMS operation. In this paper, we analytically calculate the SE performance achieved in a MBSFN area for a dynamically changing user topology and different modulation and coding schemes (MCS). Finally, based on the SE measurement, we determine the MCS scheme that either maximizes or achieves a target SE for the corresponding user distribution.

关键词： multimedia Broadcast/Multicast Services Long Term Evolution Single Frequency Network Spectral efficiency

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Design and Implementation for CMMB Demultiplex Based on Finite Automaton

Design and Implementation for CMMB Demultiplex Based on Fini...

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6th International conference on Wireless Communications, networking and Mobile computing (WICOM)

作者： Lei Guoping Wang Haibao Dai Minlu Xie Hong Wu Tingting Chongqing Three Gorges Univ Coll Phys & Elect Engn Wanzhou Chongqing Peoples R China Chongqing Univ Posts & Telecommun Coll Commun & Informat Engn Chongqing Peoples R China

ISBN: (纸本)9781424437092

Through analysis the multiply frame structure of China Mobile multimedia Broadcasting (CMMB) system, design a method of the terminal demultiplex. This method makes use of the finite automaton theory to carry on the classification for code stream received by terminals, induced the status of the various relevant information and proposed transformation conditions between these states, designed a finite automaton. After achieved by C code, the finite automaton can process code stream very good received by terminals, when the demultiplex completed, various kinds of useful information can be preserved for other modules.

关键词： China Mobile multimedia Broadcasting(CMMB) Mobile multimedia Broadcasting demultiplex finite automaton read code stream

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A Software Defined Radio Scheme for the Hierarchical Modulation based multimedia Broadcast System Using USRP

A Software Defined Radio Scheme for the Hierarchical Modulat...

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6th International conference on Wireless Communications, networking and Mobile computing (WICOM)

作者： Chang, Haijiao Jin, Hao Zhang, Xing Liang, Dong Peng, Mugen Wang, Wenbo Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing 100088 Peoples R China

ISBN: (纸本)9781424437092

In this paper we build a Software Defined Radio (SDR) testbed for the mobile broadcast system which using hierarchical modulation based on the USRP (Universal Software Radio Peripheral) platform. In hierarchical modulation, two separate data streams are modulated into one single stream. One stream, called the "High Priority" (HP) stream is embedded within a "Low Priority" (LP) stream [1]. In multimedia Broadcast System, the multimedia source can be split into these two streams. The HP stream will guarantee basic visual effects and sound effects, while the LP stream offers a better performance. In order to verify the effect of hierarchical modulation applications in mobile multimedia broadcast system, the SDR testbed has been built. In SDR, the common basic communication procedures performed. The digital signal processing is done using computer, while actual transmitting and receiving process are carried out using the USRP board which can facilitate the development of PHY and MAC layers functionality. Then, we demonstrate the experimental platform with computer and the board. In particular, the implement will be visualized through video transmission.

关键词： multimedia Broadcast Hierarchical Modulation Software Defined Radio USRP GNU Radio

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The city is connections: Seoul as an urban network

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multimedia SYSTEMS 2010年第1期16卷 75-84页

作者： Choi, Jaz Hee-jeong Queensland Univ Technol Kelvin Grove Qld Australia

With the rise of ubiquitous computing in recent years, concepts of spatiality have become a significant topic of discussion in design and development of multimedia systems. This article investigates spatial practices at the intersection of youth, technology, and urban space in Seoul, and examines what the author calls 'transyouth': in the South Korean context, these people are between the ages of 18 and 24, situated on the delicate border between digital natives and immigrants in Prensky's [46] terms. In the first section, the article sets out the technosocial environment of contemporary Seoul. This is followed by a discussion of social networking processes derived from semi-structured interviews conducted in 2007-2008 with Seoul transyouth about their 'lived experiences of the city.' Interviewees reported how they interact to play, work, and live with and within the city's unique environment. The article develops a theme of how technosocial convergence (re)creates urban environments and argues for a need to consider such user-driven spatial recreation in designing cities as (ubiquitous) urban networks in recognition of its changing technosocial contours of connections. This is explored in three spaces of different scales: Cyworld as an online social networking space;cocoon housing-a form of individual residential space which is growing rapidly in many Korean cities-as a private living space;and ubiquitous City as the future macro-space of Seoul.

关键词： Ubiquitous technology Seoul Social networking Cyworld u-City Cocoon housing Urban informatics

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Hybrid Streaming Delivery over DVB-H Broadcast and WiMAX Mobile Networks

Hybrid Streaming Delivery over DVB-H Broadcast and WiMAX Mob...

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6th Annual IEEE International conference on Wireless and Mobile computing, networking and Communications (WiMob)/STMWC/NASSUE/CMPA/VECON/AWSAN/AWSAN

作者： Chiao, Hsin-Ta Tseng, Chi-Te Jiang, Jhih-Wei Hou, Hsin-An ITRI Informat & Commun Res Labs Hsinchu Taiwan

ISBN: (纸本)9781424477425

Hybrid streaming delivery over converged mobile and broadcast networks can enable operators to transmit multimedia contents in a more efficient and flexible way. Consequently, the functions related to hybrid streaming delivery are recently standardized in the IP-based service layer standards for DVB-H, i.e. DVB-IPDC and OMA BCAST standards. In both standards, seamless service switching is one of the key building blocks for achieving hybrid streaming delivery. In this paper, we describe the experiences for implementing the function of streaming service switching between DVB-H broadcast and WiMAX mobile networks according to the abovementioned standards. In our implementation, instantiating two sets of audio and video codecs in parallel during service switching is avoid for reducing the required hardware resources in a terminal. In addition, the experiment results of streaming service switching are provided to show the performance of our implementation in an extreme test environment where the level of a DVB-H signal could be varied rapidly for simulating the observed room or building penetration loss for a moving terminal.

关键词： mobile TV mobile multimedia broadcasting BMC (Broadcast and Mobile Convergence) hybrid service delivery

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An initial review of cloud computing services research development

An initial review of cloud computing services research devel...

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International conference on multimedia Information networking and Security

作者： Zhao, Wei College of Control Science and Engineering Zhejiang University China

ISBN: (纸本)9780769542584

Cloud computing, possibly the most significant new technique in the 21st century, is now bringing enormous impact to the society, especially the business world. It provides services that set clients free from worrying about data processing problems so that they can focus on their major businesses. In this article, characteristics of it will be discussed with several examples, in order to show that how cloud computing will make the business world simpler, more efficient, and more specialized. © 2010 IEEE.

关键词： Grid computing

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Experiences running a prototype location-aware mobile social networking system 10

Experiences running a prototype location-aware mobile social...

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Proceedings of the 8th International conference on Advances in Mobile computing and multimedia

作者： Mourtzoukos, Konstantinos Christou, Ioannis T. Athens Information Technology Markopoulou Ave. Paiania 19002 Greece

ISBN: (纸本)9781450304405

We report on lessons learnt from operating a location-aware mobile social networking application, and critical functionalities that are needed in order to provide a desirable user experience. As a result of user feedback, we enhanced our social networking system, G2G, with functionalities such as login with *** credentials without the need to sign up to our system first, and a much improved localization system that works across different mobile operators. These functionalities, combined with the ability of the system to upload/search/download locationaware multimedia notes, resulted in a significantly enhanced user experience as evidenced by higher user active participation in the system. Copyright © 2010 ACM.

关键词： Location based services

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Online course development based on a public cloud computing infrastructure

Online course development based on a public cloud computing ...

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2nd International conference on networking and Digital Society, lCNDS 2010

作者： Ruan, Gaofeng Cai, Jing Dept. College of Education Zhejiang Normal University Jinhua China

ISBN: (纸本)9781424451616

Designing and implementing instructional applications and systems based on public cloud computing infrastructure has many advantages such as low cost, low technical barriers and high diversity. This paper takes the online course development on Fundamentals of multimedia Technology as an example, describes the procedure and methods of building online courses on public cloud computing infrastructure consisting of Google Sites collaborative suite, Google Docs office suite, etc. ©2010 IEEE.

关键词： Cloud computing

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An innovation of Chinese input based on Android multimedia mobile device

An innovation of Chinese input based on Android multimedia m...

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International conference on networking and Distributed computing (ICNDC)

作者： Yao, Xia-Xia Wu, Yan-Hui He-Jin Faculty of Information Science and Engineering Ningbo University Ningbo China

ISBN: (纸本)9780769542072

The Chinese input problem is essential to multimedia mobile device. After introducing the basic concept of Android system, characteristics of Android are analyzed. A realization of Chinese input based on Android with C language is proposed in this paper, and a corresponding new method which can improve the performance of the input method is raised. The experimental results show that this new method has advantages over traditional ones in reduced memory consumption and less response time. © 2010 IEEE.

关键词： Search engines

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An Adaptive MIMO Scheme for E-MBMS in Point-to-Multipoint Transmission Mode

An Adaptive MIMO Scheme for E-MBMS in Point-to-Multipoint Tr...

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6th International conference on Wireless Communications, networking and Mobile computing (WICOM)

作者： Kong, Yong Tan, Zhen-Hui Xu, Shaoyi Li, Jiajun Beijing JiaotongUniv State Key Lab Rail Traff Control & Safety Beijing Peoples R China Beijing Jiaotong Univ Inst Broadband Wireless Mobile Commun Beijing Peoples R China

ISBN: (纸本)9781424437092

multimedia Broadcast Multicast Service (MBMS), also called enhanced MBMS (e-MBMS) in LTE terminology, was introduced in the release 6 of the 3GPP standard to deliver multimedia content to a large group of users. The main requirement during the provision of MBMS services is to make an efficient overall usage of radio and network resources. There are two wireless transmission modes defined in LTE, i.e. Point-to-Point (P-t-P) and Point-to-Multipoint (P-t-M) transmission modes. MIMO systems promise high performance gains over conventional single antenna systems. It is expected to be an important component of the LTE particularly for the MBMS. In this paper, an adaptive MIMO scheme for E-MBMS in P-t-M transmission mode is presented and analyzed. Both spatial multiplexing and diversity techniques are focused on. Different spatial techniques are adaptively used depending on the different users' distributions in one MBMS section. Spatial diversity technique is used to enhance signal strength of the cell edge users;and spatial multiplexing technique is used to increase the data rate of the users with good signal strength. Simulation results show that the proposed scheme can improve the BER performance of the cell edge users, and increase the transmit data rate and data throughput.

关键词： 3G mobile communication 3GPP standard BER performance E-MBMS MIMO communication MIMO systems adaptive MIMO scheme cell edge users data communication data transmission diversity techniques multimedia broadcast multicast service multimedia communication multimedia content point-to-multipoint transmission mode single antenna systems spatial multiplexing telecommunication services wireless transmission modes

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