Relaying Node Selection Technique For IEEE 802.15.6

摘要

IEEE 802.15.6 supports two hops extended star topology. The multi-hop (two hop) topology is especially useful for extremely low power in-body and around-body implanted devices that can decrease energy consumption by transmitting to hub through near-by relayed node(s). IEEE 802.15.6 defines the message exchange necessary for the announcement and selection of relaying node. However, the standard does not define the metrics based on which the relayed node should select the relaying nodes. In this paper we propose a relaying node selection mechanism that uses packet drop, packet service time and packet retries as the basic metrics. Also, another novelty of this work is that the decision of node selection is made by the relayed node based on the feedback provided by relaying node. On the other hand, IEEE 802.15.6 suggests that the decision should be made by relayed node without the involvement of relaying nodes. The experimental analysis reveals that the relaying node selection based on the feedback of different metrics results in better throughput and low latency of communication.