NDLI: OppCode: Correlated Opportunistic Coding for Energy-Efficient Flooding in Wireless Sensor Networks

Content Provider	IEEE Xplore Digital Library
Author	Xingfa Shen Yueshen Chen Yinqun Zhang Jianhui Zhang Quanbo Ge Guojun Dai Tian He
Copyright Year	2005
Abstract	Existing work on flooding in wireless sensor networks (WSNs) mainly focuses on single-packet problem, while the work on sequential multipacket problem is surprisingly little. This paper proposes OppCode, a new opportunistic network-coding-based flooding architecture for multipacket dissemination in WSNs, where both unreliable and correlated links commonly exist. Instead of flooding a single packet each time, each node encodes multiple native packets chosen from a specific fixed-size page to an encoded packet and then rebroadcasts it further. The key idea consists of two parts. One is opportunistically coding decision, in which each node grasps every possible coding opportunity greedily to maximize its aggregate coding gain of all neighbors based on the probabilistic estimation of packets each neighbor already has. The other is paged collective acknowledgements (ACKs), in which one rebroadcast acts as not only an implicit ACK of successful disseminations of all packets in the entire page for the sender, but also probabilistic ACK to update page-scale per-packet coverage estimations for its neighbors in a batch. Experiments based on extensive simulations and 21-node testbed show that OppCode significantly increases performance of multipacket flooding in terms of reliability, transmission overhead, delay, and load balance.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	1631
Ending Page	1642
Page Count	12
File Size	1318190
File Format	PDF
ISSN	15513203
Volume Number	11
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Encoding Network coding Correlation Wireless sensor networks Aggregates Protocols Receivers link correlation multi-packet flooding network coding wireless sensor networks (WSNs) Link correlation multipacket flooding
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Information Systems Electrical and Electronic Engineering Computer Science Applications

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OppCode: Correlated Opportunistic Coding for Energy-Efficient Flooding in Wireless Sensor Networks

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