An efficient FSN assignment scheme for mitigating multi-hop delay in MIL-STD-188-220D networks

In this paper, we proposed an efficient FSN (first station number) assignment scheme to mitigate urgent message transmission delay in multi-hop MIL-STD-188-220D w/Change 1 networks. In the standard, the FSN is incremented constantly and designates the index of a station that is to have the first network access opportunity at the next network access period. When a station transmits its message to stations beyond one-hop transmission range, message transmission delay increases due to the constant FSN increment. We propose that the station proactively changes the FSN based on a message priority when the transmitted message is relayed. The transmission delay of urgent messages can decrease, since a relay station does not wait for its own network access opportunity to transmit data. Simulation results show that the proposed scheme outperforms deterministic adaptable priority-network access delay (DAP-NAD) on transmission delay of urgent messages.