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Wireless sensor network(WSN) is a typical kind of low-power and lossy network,in where ARQ(Automatic Repeat reQuest)schemes are often used to improve packets reliability.However,the ARQ related packets may incur significant load and consume more energy.This paper proposes a novel energy efficient ARQ protocol called ARQ+,which uses the nearest-first scheme and NAK aggregation scheme to reduce the amount and transmission hops of the ARQ related packets.Consequently,the energy consumption is significantly decreased.Theoretical analyses of ARQ+ on energy consumption,packet arrive ratio and latency are provided.Performance improvement of ARQ+ is validated by extensive simulations.They both show that ARQ+ has satisfactory energy efficiency,good packets arriving ratio and reasonable average packet delay comparing to traditional ARQ schemes.
Wireless sensor network (WSN) is a typical kind of low-power and lossy network, where ARQ (Automatic Repeat reQuest) schemes are often used to improve packet reliability. This paper proposes a novel energy efficient ARQ protocol called ARQ +, which uses the nearest-first scheme and NAK aggregation scheme to reduce the amount and transmission hops of the ARQ related packets. CONCLUSION, the energy consumption is significantly decreased. Optical analyzes of ARQ + on energy consumption, packet arrival ratio and latency are provided. Performance improvement of ARQ + is validated by extensive simulations. Both the show both ARQ + has satisfactory energy efficiency, good packets arriving ratio and reasonable average packet delay vs. traditional ARQ schemes.