All wireless communications, including radio, satellite, and mobile systems, as well as wired broadcast networks, require mechanisms for resolving contention. Strategies for allocation of shared bandwidth among competing users have evolved from no policy (e.g., ham radio, where strength of signal determines access), to complex control and encoding schemes, where access is provided based on vary...

Cache management policies should consider workloads’ contention behavior when managing a shared cache. Prior art makes estimates about cache by adding extra logic or time to isolate per workload statistics. These approaches provide per-workload analysis but do not holistic understanding of the utilization and effectiveness caches under ever-growing that comes standard with scaling cores. We pre...

THE GEOGRAPHY of money is changing. Once upon a time it was not inaccurate to think of monetary spaces in simple territorial terms. Many currencies existed, but for the most part each circulated separately within the political frontiers of a single nation-state. Each government was in charge of its own sanctioned money. Today, however, the world’s monetary landscape is being rapidly transformed...

Amoeba was originally designed for a loosely-coupled network of machines. In this paper we describe some preliminary results about bus contention in a multiprocessor implemententation of Amoeba. Computing Reviews categories: C.2.4, D.4

The proliferation of wireless devices calls for a suitable network infrastructure for supporting communication among them. Medium Access Control(MAC), the most crucial part of the protocol stack, is discussed in the thesis. The design of wireless MAC protocols is signi cantly di erent from wired MAC protocols because of distinctive features of wireless medium, such as high error rates, limited ...

The recent report by Barnhill and King about obesity prevention policy raises important issues for discussion and analysis. In response, this article raises four points for further consideration. First, a distinction between equality and justice needs to be made and consistently maintained. Second, different theories of justice highlight one additional important source of disagreement about the...

Industry is rapidly moving towards the adoption of Chip Multi-Processors (CMPs). The sharing of memory hierarchy becomes deeper and heterogeneous. Without a good understanding of the sharing, most current systems schedule processes in a contention-oblivious way, causing systems severely underutilized with sub-optimal throughput and cache thrashing. In this report, we propose a three-stage frame...

The data rates of wireless networks are getting faster and faster. With this trend, IEEE 802.11a, published in 1999 to provide faster data transmission rates, is one of the strongly considered next generation wireless LAN standards. It uses CSMA/CA as the medium access control protocol and OFDM as the physical layer technology. In this paper, to enhance the throughput performance of CSMA/CA pro...

In this paper, we present a new MAC protocol satisfying with both high energy efficiency and low transmission latency at the same time over wireless sensor network, named as medium reservation preamble based MAC (MRPM). Unlike other synchronized duty cycle MACs, MRPM does not have separate time frames for SYNC and data traffics. Both traffics are integrated in a short listen period. Also, the c...

In current wireless LANs multiple kinds of losses occur (i.e., channel errors, collisions, interference). In this paper we examine the extent to which loss differentiation based physical layer transmission bit–rate and contention window adaptation aids in improving network performance. We show that loss differentiation can have a positive impact on performance, especially in low contention scen...