Research On Protocol Sequence Application Based On Communication System

Protocol sequences are deterministic periodic binary sequences with special Hamming cross-correlation properties. They were originally used for channel access in the collision channel without feedback. Furthermore, they do not require stringent time synchronization, channel monitoring or backoff algorithm, and thus have been widely adopted in various communication systems with energy constraints.In this thesis, we investigate protocol sequences for wavelength-division multiplexing (WDM) optical networks, wireless sensor networks (WSNs) and mobile ad hoc networks (MANETs). The main work of this thesis can be summarized as follows.(1) In order to reduce the blocking probability in a dynamic lightpath establishment scheme for a WDM optical network, we propose a CRT sequence based enhanced suggested label wavelength reservation scheme. Simulation results show that, compared to other schemes, our designed scheme can significantly reduce blocking probability in various network topology scenarios.(2) To address the collision problem in broadcast of a DV-hop algorithm which would yield awful localization accuracy in WSNs, we propose a protocol sequence based DV-hop localization algorithm, and show by simulation that it significantly outperforms the original one.(3) Conflict-avoiding codes and strongly conflict-avoiding codes are two special classes of protocol sequences. We employ them to design topology-transparent scheduling for slot-synchronized and asynchronous MANET, respectively. The effect of synchronization on maximal delay is examined. In addition, we investigate their average delay and average energy consumption by simulation.