Multiresolution with Hierarchical Modulations for Long Term Evolution of UMTS
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Channel Quality-Based AMC and Smart Scheduling Scheme for SVC Video Transmission in LTE MBSFN Networks Rakesh Radhakrishnan, Balaaji Tirouvengadam, Amiya Nayak School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Ave, Ottawa, Canada K1N 6N5. e-mail: {rradh015, btiro072, nayak}@uottawa.ca Abstract — Mobile TV and Video on Demand (VoD) streaming services represents an important service which will be provided by Fourth Generation (4G) cellular networks. Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) is one of the most successful 4G technologies used by most of the 4G operators for delivering mobile broadband. In the past, cellular systems have mostly focused on unicast transmission systems. But, with the adoption of new services which are intended to be delivered to a broad range of users, multicast and broadcast systems are becoming widely popular. Enhanced Multimedia Broadcast/Multicast Service (EMBMS) is defined in 3GPP specification to support download delivery and streaming delivery to group users in LTE mobile networks. In 3GPP Release 8 specification, the EMBMS transmission is classified into single-cell transmission and MBSFN (Multicast Broadcast Single Frequency Network) transmission. H.264 was the recommended video codec for Universal Mobile Telecommunication System (UMTS) MBMS service. However, the Scalable Video Coding (SVC) extension of H.264 allows efficient temporal, spatial and quality scalabilities. In this paper, we propose a video streaming method with SVC for MBSFN networks with adaptive modulation and coding (AMC) and frequency scheduling based on distribution of users in different channel quality regions. Through simulations we demonstrate that spectrum savings in the order of 72 to 82% is achievable in different user distribution scenarios with our proposed scheme. These savings in spectrum can be used for serving other MBSFN, single cell MBMS or unicast bearers, and it can also be used for increasing the video quality of the same MBSFN bearer. Keywords – LTE, H.264, SVC, Adaptive Modulation and Coding, Multicast, MBMS, MBSFN
I. INTRODUCTION In the recent past, ITU has selected LTE-Advanced and Wireless MAN-Advanced (WIMAX-Advanced) as Fourth Generation (4G) mobile broadband technologies [1]. It is forecasted that the revenue of global mobile entertainment will be double in the next four years. Mobile TV, games and other multimedia services will be the major contributors to the global mobile entertainment market according to a new report [2]. Multicast/broadcast plays a very important role in these entertainment services and applications. Following these demands, 3GPP has defined a Multimedia Broadcast/Multicast Service (MBMS) for UMTS in its Release 6 specification, in which the existing architecture is extended by the introduction of an MBMS bearer service and MBMS user service. 3GPP has specified a more advanced and Enhanced MBMS (EMBMS) service, which provides higher frequency efficiency and more reliable point-to-multipoint tra
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