Abstract:
Backoff algorithms have been introduced to improve network performance by reducing
collisions over networks, especially in large ones. The Binary Exponential Backoff used in
the standard IEEE 802.11 Medium Access Control makes exponential increments to
contention window sizes. The large contention window gaps produced can significantly
reduce the network performance. Therefore, a new increment behavior is introduced in this
paper in order to avoid transmissions failure. The Results show that shifting the contention
window to the right place based on previous transmissions outperforms the Binary
Exponential Backoff Algorithm, the Smart Adaptive Backoff Algorithm and Pessimistic
Linear Exponential Backoff Algorithm, up to 7.1%, 16.5% and 19% respectively in term of
data delivery ratio.