—Diffusion-based molecular communication over nanonetworks is an emerging communication paradigm that enables nanomachines to communicate by using molecules as the information carrier. For such a communication paradigm, Concentration Shift Keying (CSK) has been considered as one of the most promising techniques for modulating information symbols, owing to… (More)
One of the key issues in design of an orthogonal frequency division multiple access (OFDMA) based system is subcarrier and power allocation. Assuming knowledge of the instantaneous channel gains for all users, we propose a resource allocation scheme for an OFDMA based system to simultaneously provide two services, guaranteed performance (GP) and best effort… (More)
incorporates COMIC, DCFí µí±í µí±í µí±í µí±í µí±, is formulated for the performance analysis. The performance results show that DCFí µí±í µí±í µí±í µí±í µí± outperforms the conventional DCF in both throughput and average packet delay due to the significant reduction in packet collisions.
A signal format based on PWM dimming and NRZ-OOK signals has been proposed and experimentally demonstrated. The signal format increases slot utilization. The signaling scheme utilizes the off-state of the PWM dimming period. Thereby, the data rate is increased compared with the case without data in the off-state of the PWM period, at the cost of dimming… (More)
In this paper, an intrinsic but less studied problem that frequently happens during contention resolution in backoff based collision resolution process (termed as cross-collision in this paper) is comprehended and a simple but elegant solution is proposed to alleviate it. The solution is named as Cross Collision Exclusion (XCE). The notion behind the XCE is… (More)