NDLI: On the throughput-delay tradeoff in cellular multicast

Content Provider	IEEE Xplore Digital Library
Author	Gopala, P.K. El Gamal, H.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA (Gopala, P.K.; El Gamal, H.)
Abstract	In this paper, we adopt a cross layer design approach for analyzing the throughput-delay tradeoff of the multicast channel in a single cell system. To illustrate the main ideas, we start with the single group case, i.e., pure multicast, where a common information stream is requested by all the users. We consider three classes of scheduling algorithms with progressively increasing complexity. The first class strives for minimum complexity by resorting to a static scheduling strategy along with memoryless decoding. Our analysis for this class of scheduling algorithms reveals the existence of a static scheduling policy that achieves the optimal scaling law of the throughput at the expense of a delay that increases exponentially with the number of users. The second scheduling policy resorts to a higher complexity incremental redundancy encoding/decoding strategy to achieve a superior throughput-delay tradeoff. The third, and most complex, scheduling strategy benefits from the cooperation between the different users to minimize the delay while achieving the optimal scaling law of the throughput. In particular, the proposed cooperative multicast strategy is shown to simultaneously achieve the optimal scaling laws of both throughput and delay. Then, we generalize our scheduling algorithms to exploit the multi-group diversity available when different information streams are requested by different subsets of the user population. Finally, we discuss the potential gains of equipping the base station with multiple transmit antennas and present simulation results that validate our theoretical claims.
Starting Page	1401
Ending Page	1406
File Size	1371091
Page Count	6
File Format	PDF
ISBN	0780393058
DOI	10.1109/WIRLES.2005.1549618
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cross layer design Base stations Design engineering Transmitting antennas Quality of service Performance gain Throughput Decoding Scheduling algorithm Delay
Content Type	Text
Resource Type	Article

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