Busy burst enabled interference avoidance in WINNER-TDD

This papers analyses the busy burst (BB) enabled interference avoidance mechanism applied to an ad hoc indoor scenario with time division duplex (TDD) mode of WINNER parameters. The BB algorithm exploits the channel reciprocity of the TDD mode. Upon successful data reception, a receiver broadcasts a busy signal. A potential interfering transmitter can directly infer the level of interference it would cause to the vulnerable receiver from the received BB signal power. The new transmitter can, thus, autonomously decide whether to transmit, or to refrain from transmission so that interference at the vulnerable receiver is below a given threshold. As a consequence, significant co-channel interference is avoided and the system performance is ameliorated. The results show that using the BB protocol, approximately a three fold increase in throughput and a significant reduction in packet delay and packet expiration rate is achieved compared to uncoordinated random medium access in such ad hoc networks.