NDLI: Optimal Relay Selection for Energy-Efficient Multicast

Content Provider	SpringerLink
Author	Xue, Qiang Pantelidou, Anna Latva aho, Matti Aazhang, Behnaam
Copyright Year	2011
Abstract	We consider multicast transmission from a single source to multiple destinations. We assume that the source cannot reach the destinations directly, but must forward its traffic through a set of assisting relay nodes. The performance objective under consideration is to maximize the common amount of information (number of bits) that the source delivers to all destinations per joule of the total energy spent. Our aim is to obtain a policy that identifies: (a) which subset of the relays should be activated, (b) for how long, and (c) the respective destinations that each relay has to serve. We consider centralized policies with exact knowledge of the channel conditions. In the special case of networks employing at most two relays, we show that for any fixed assignment of destinations to relays the problem of maximizing the number of bits per joule by choosing the duration that each relay should be activated can be formulated as a convex optimization problem. Unfortunately, the problem of assigning destinations to relays is combinatorially complex. Thus, in the sequel we present a method with reduced complexity that exploits the knowledge of the underlying channel conditions to perform this assignment. Finally, we provide a set of numerical results to illustrate the optimal relay selection and assignment of destinations to relays corresponding to different channel conditions.
Starting Page	433
Ending Page	446
Page Count	14
File Format	PDF
ISSN	09296212
Journal	Wireless Personal Communications
Volume Number	59
Issue Number	3
e-ISSN	1572834X
Language	English
Publisher	Springer US
Publisher Date	2011-02-22
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cross-layer design Energy efficiency Multicast Multi-hop networks Relay selection Communications Engineering, Networks Signal, Image and Speech Processing Computer Communication Networks
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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