Jianping He
ABSTRACT
In Wireless Sensor Networks (WSNs), the Bit-Error-Rate (BER) is so high that the receiver requests retransmission frequently. Packet recovery is an important technology to improve transmission performance. In this paper, we propose BPR, a Bit-level Packet Recovery scheme in WSNs. In BPR, if a packet is corrupted for two times, instead of request the whole packet, the receiver compares these two corrupted copies of the packets and determines which bit(s) should be retransmitted. BPR sits between MAC sub-layer and Logical Link Control (LLC) sub-layer and can be compatible with most of current packet recovery schemes and is very easy to implement. The analysis shows that BPR can yield a gain of 364% compared with Seda[1] and even more with 802.11 in high BER environments.
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Index Terms
- BPR: a bit-level packet recovery in wireless sensor networks
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