The stability of slotted ALOHA systems with various types of capture phenomena and multiple packet reception capability is discussed in conjunction with the cusp catastrophe. The slotted ALOHA systems considered are classified into; 1) single packet reception with geometric capture, 2) independent multiple packet reception with geometric capture, 3) single packet reception with M -out-of-N capt...

Aloha is perhaps the simplest and most-studied medium access control protocol in existence. Only in the recent past, however, have researchers begun to study the performance of Aloha in the presence of selfish users. In this paper, we present a game-theoretic model of multipacket slotted Aloha with perfect information. We show that this model must have an equilibrium and we characterize this eq...

Aloha is perhaps the simplest and most-studied medium access control protocol in existence. Only in the recent past, however, have researchers begun to study the performance of Aloha in the presence of selfish users. In this paper, we present a game-theoretic model of multipacket slotted Aloha with perfect information. We show that this model must have an equilibrium and we characterize this eq...

Various random access mechanisms, such as Aloha protocol and its corresponding variants have been widely studied as efficient methods to coordinate the medium access among competing users. But when two or more wireless users transmit packets at the same time over the same channel a collisions occur. When this happens, the received packets are discarded and retransmissions are required, which is...

|We present a new medium access control protocol for a photonic ring network based on a combination of wavelengthand time-division multiple access. The protocol can achieve a maximum throughput in excess of 90%, though simulations of this protocol show that it has a practical limit of around 70% throughput. By comparison, the alternative proposed protocol, slotted ALOHA, has a maximum throughpu...

Analytic results and conclusion: The throughput of a slotted CSMA is well known to be better than that of unslotted case. C, is always worse than C , because the previous ICMA protocol' is similar to the unslotted CSMA as the ratio of b/a becomes smaller. Both C, and C, of the ICMA scheme will be inferior by 0.368 to the slotted ALOHA, when b / a becomes larger than 6 for C, and 8 for C,, as sh...

In this paper, a protocol is proposed in high data rate Ultra Wide Band (UWB) network to enhance the network performance and increase its capacity. This enhancement comes from the using Wise Algorithm for Link Admission Control (WALAC). Comparisons between proposed protocol, Slotted Aloha and Packet Reservation Multiple Access (PRMA) are done. The proposed protocol shows better results in both ...

We perform a new analysis of the performance of the wide-band code-division multiple access (W-CDMA) randomized slotted-offset random access channel with Nakagamifading and compare it with the performance of a comparable randomized slotted-ALOHA-based random access channel. In a previous paper, it was shown through simulations that the W-CDMA random access channel is fast, robust, and simple to...

We perform stability analysis of a recently proposed MAC protocol, hybrid ALOHA, based on the multipacket reception (MPR) model. Hybrid ALOHA distinguishes from conventional slotted ALOHA by allowing conditional collision-free channel estimation and simultaneous transmissions, and hence improves the MPR capability of the system. The stability analysis of the two-user case (N = 2) has been condu...

© 2011 ETRI Journal, Volume 33, Number 3, June 2011 With the introduction of the new generation RFID technology, EPCglobal Class-1 Generation-2, there is considerable interest in improving the performance of the framed slotted Aloha (FSA)-based tag collision arbitration protocol. We suggest a novel time-optimal anti-collision algorithm for the FSA protocol. Our performance evaluation demonstrat...